Cold Bore Improvment

[clayne_b]

Im sure this has beaten to death already... But I have done about everything i can think of about my cold bore shot. many changes have been made to my gun with not much change... My cold bore shot used to be all over the place. Now after all the things i have done to my rifle over the last six months... stock, trigger kit, bedded action. tried different cleaning techniques. I am now down to this... My cold bore is half a mil high at 25 yards. If I let the gun sit for just a few min the first shot is half a mil high.... and the rest of the shots are spot on! WTF! any input would be appreciated.

 

[Wesek]

Re: Cold Bore Improvment

What type of rifle? Check rimfire central. There are some interesting theories floating around that place, especially in the CZ forum.

 

[clayne_b]

Re: Cold Bore Improvment

It is a CZ 452 Scout

 

[clayne_b]

Re: Cold Bore Improvment

I did some cleaning on the gun to night, I mopped it with hoppe's 9 and brushed the phuck out of it with a nylon brush. and did a 2 passes with the bronze brush. then ran some easily fitting patches followed by some tight fitting. i was getting lead slivers and little chunks of black stuff out. I repeated this process a few times. I should get a chance to go shoot it tomorrow. I think this is the cleanest this rifle bore has ever been in its life.

 

[clayne_b]

Re: Cold Bore Improvment

I went out and shot.
93 degrees
Durring wait time the rifle and ammo were in the shade. and i was working on my tan.
Shot prone with bipod and rear bag.

 

[clayne_b]

Re: Cold Bore Improvment

Went out again and shot a few more rounds, It was cooler and less wind. almost dark..

So the rifle sat for half the day and my first shot was a happy sight

 

[Topstrap]

Re: Cold Bore Improvment

Try not cleaning it before next trip out and see how the cold bore shot does. Also found that if you switch brands of ammo it takes a few shots to settle back in, probably based on the lube used by the different manufactures. Sometimes that first shot might be off due to shooter not being in the groove and comfortable behind the gun. Lots of factors but I'm sure you'll find the culprit.

Might sound odd to some but I've never cleaned any of my 22LR guns other than if the action gets sticky I'll clean the gunk off and lightly oil. They all have had untold 1000's of rounds thru them and even at extended distances similar to what you enjoy doing they still do fine.

Shot with a heavy bbl 10/22 that has never cleaned.

Topstrap

 

[JelloStorm]

Re: Cold Bore Improvment

Here's what I do with my 17HMR for hunting season.

I'll take it out a few days prior and zero and after a day of shooting I'll clean it. Then, take it back out and put just a few rounds through it to fowl up the bore.

This helps maintain the cold bore accuracy as I have found that my cold (aka clean) bore shots are slightly off vs. a fouled bore.

YMMV

 

[Longguns]

Re: Cold Bore Improvment

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Topstrap</div><div class="ubbcode-body">Try not cleaning it before next trip out and see how the cold bore shot does. Also found that if you switch brands of ammo it takes a few shots to settle back in, probably based on the lube used by the different manufactures. Sometimes that first shot might be off due to shooter not being in the groove and comfortable behind the gun. Lots of factors but I'm sure you'll find the culprit.

Might sound odd to some but I've never cleaned any of my 22LR guns other than if the action gets sticky I'll clean the gunk off and lightly oil. They all have had untold 1000's of rounds thru them and even at extended distances similar to what you enjoy doing they still do fine.

Shot with a heavy bbl 10/22 that has never cleaned.

Topstrap </div></div>+1 on this advice. I don't clean mine either.

 

[1shot2kill]

Re: Cold Bore Improvment

I have noticed match ammo that uses alot of lube my cold bore shots are always high